Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: Fix out of bounds when parsing TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 ("ipv4: tcp_input: fix stack out of bounds when parsing TCP options.").
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.6, < 5.10.46 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/07718be265680dcf496347d475ce1a5442f55ad7Patch
- https://git.kernel.org/stable/c/73eeba71dc9932970befa009e68272a3d5ec4a58Patch
- https://git.kernel.org/stable/c/76e02b8905d0691e89e104a882f3bba7dd0f6037Patch
- https://git.kernel.org/stable/c/07718be265680dcf496347d475ce1a5442f55ad7Patch
- https://git.kernel.org/stable/c/73eeba71dc9932970befa009e68272a3d5ec4a58Patch
- https://git.kernel.org/stable/c/76e02b8905d0691e89e104a882f3bba7dd0f6037Patch
FAQ
What is CVE-2021-47244?
CVE-2021-47244 is a vulnerability with a CVSS score of 6.2 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: mptcp: Fix out of bounds when parsing TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bo...
How severe is CVE-2021-47244?
CVE-2021-47244 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47244?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.